shelve

v [I, Ip] ~ (away/down/off) (of land) slope gradually (in the specified direction) （指陆地）呈缓坡倾斜: The river-bottom shelves here. 河底从这里呈缓坡倾斜. * The shore shelves down to the sea. 海岸向海面的倾斜角度很小.

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